of paris



UNITED STATES PATENT OFFICE.

PAUL GALLEY, F PARIS, FRANCE, ASSIGNOR TO SOCIETE FRANCAISE DU CERAMPID,0F PARIS, FRANCE, A CORPORATION OF FRANCE.

Patented Nov. 11. 1919.

Application fi1ed J'anuary 29, 1918. Serial 'No. 214,400.

.AUGU STE PLASTIC MATERIAL.

1 321 429 Specification of Letters Patent.

No Drawing.

To all whom z'z fimay concern:

Be it known that I, AUGUSTE -PAUL GALLEY, of 1 rue'Xicol-ai. Paris,France,

- for molding the heads-and bodies of dolls.

.molded before it sets too hard.

A compact and very tenacious material consisting of a mixture of zincvchlorid and 'zinc oxid is produced as is well known when hydrochloricacid, acts upon zinc oxid:

If a concentrated solution of zinc chlorid in place of hydrochloric acidis caused to act directly upon zinc oxid the so-called.

Meyer cement is produced, but this cannot be utilized eitherexperimentally or commercially because of the great and rapid evolutionof heat which occurs when the bodies are mixed together.

Moreover, even if Meyer cement could be molded the article producedwould be as brittle as glass or porcelain.

According to this invention the reaction which produces zinc oxychloridis retarded by causing it to take place within a colloidal mass so thatthe plastic material can be The solution also of zinc chlorid isreplaced by a solution of an alkaline earth chlorid, preferably calciumchlorid, in which case'the reaction is no longer violent, but very slow:a mixed salt of zinc and calcium, viz., the oxychlorid of zinc andcalcium (Zn Ocl Ca OCl is produced by double decomposition. v

Preferably the invention is carried out as follows:

The necessary quantity of zinc oxid is added little by little and withcontinual stirring to a colloidal substance (gelatin, for example) whichhas been liquefied. by hydration and heat; a concentrated solution(about 32 Baum) of calcium chlorid is now added, care being taken thatthe temperature'of the mixture does not rise above f C. If a moreflexible material isrequired a small quantity of sulfur may be added.

Suitable proportions are as follows:

These proportions may be varied to some extent and some of the materialsmay be replaced by their equivalents.-

Claims 1. A plastic composition adapted for making dolls and the likecomprising gelatin and zinc oxidand calcium chlorid incorporatedtherewith to constitute a slowly setting plastic mass adapted to bemolded.

2. A plastic composition adapted'for making dolls and the likecomprising gelatin and zinc oxid and an alkaline earth metal chloridincorporated therewith to constitute a slowly setting plastic massadapted to be molded.

3. A plastic composition comprising a plastic colloidal substance andzinc oxid, sulfur and calcium chlorid incorporated therewithtoconstitute a slowly setting plastic mass adapted to be molded.

l. The process of preparing a plastic composition adapted to be moldedand afterward to slowly set and harden, consisting in mixing a plasticcolloidal substance with zinc oxid and then incorporating in said masscalcium chlorid while preventing the temperature of the mixture fromrising

